Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Norris Edward Smith0
Date of Patent
May 12, 2009
Patent Application Number
10903574
Date Filed
July 30, 2004
Patent Citations Received
Patent Primary Examiner
Patent abstract
Methods and apparatus for driving a positive displacement pump disposed within a wellbore are disclosed herein. Embodiments of the present invention provide a drive mechanism for driving the downhole positive displacement pump. In embodiments of the present invention, the positive displacement pump is hydraulically driven and mechanically counterbalanced. The drive mechanism may be mechanically or electrically controlled, or may be controlled by a combination of mechanical and electrical controls.
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